Quote: Originally Posted by Vicne
Mox, can you check on your connects2 if pin 17 is connected to something ?
The pin is in use, but it is definitely not the main power supply. My guess would be that the connects2 starts mimicking a CDC once pin 17 goes high, i.e. when the HU is turned on.
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Maybe you have hi-res pictures of the PCB ?
I happen to have this one hires'ish picture, taken before I stashed the interface behind my dashboard's top cover:
Of course the PCB is double sided but unfortunately I don't have any pictures of the flip side (which actually contains only a few minor components, like a little donut shaped transformer, 2 RCA connectors, 2 crystals and a couple of electrolytic caps). The 14 pads at the bottom center belong to a small molex connector, some pins of which are not being used. The connects2 comes with a cable with a (partially wired) 14-pin harness at one end and the familiar blue ISO at the other. I have marked the pins in use with numbers.
1 = 12V (permanent)
2 = 12V switched (the famous "remote out", pin 17)
3 = UART A
4 = SPDIF GND
5 = SPDIF out
6 = UART B
7 = GND
The printing on some of the chips is a bit unclear, but the actual types can be found in one of my earlier postings:
http://www.mp3car.com/vbulletin/show...1&postcount=13
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By the way, it would be very interesting to know if the connects2 follows the same "3V/12V" convention. It would be easier to do 0V/12V if it's compatible, but if connects2 bothered making 3V/12V, it's probably a requirement...
Let me fix something to eat first, I will take the oscilloscope out into the garage afterwards. I am feeling a bit guilty of neglecting this thread, especially since you guys have been making such excellent progress lately. Sorry about that
